Infographic: Facebook's Indonesia users overtake the UK

Facebook's international spread is detailed in the latest data from digital marketing agency iCrossing, which details how much of the population uses the site and how often, their gender and average age.

The US has by far the largest audience by volume at 150 million users, or half the US population. Indonesia has the second largest userbase at just over 35m, and that userbase also skews younger than any other region at just 23.

UK use of Facebook is far more intensive, though our userbase smaller than Indonesia; 47% of the UK population uses the site, or 28.9 million users - each accessing the site an average 68 times every month. In Indonesia, despite the larger userbase, use is more like 7 average visits per month.

Mobile visits aren't broken out, which would add another layer of interest.

Data, which is for March 2011, was crunched together from Facebook's own user stats, Wikipedia's country population stats and Google's ad planner for return visit estimates.